Latest News

Publication "Qucs: An introduction to the new simulation and compact device modelling features implemented in release 0.0.19/0.0.19Src2 of the popular GPL circuit simulator.",
13th MOS-AK Workshop, Graz (A).
The presentation slides
by Mike Brinson are available
online.

What's Qucs?

Qucs stands for Quite Universal Circuit
Simulator. So far Qucs is not yet finished, but it is already
packed with features. Take a look at the screenshots to get a feel for what it
can do.

Qucs is an integrated circuit simulator which means you are
able to setup a circuit with a graphical user interface (GUI)
and simulate the large-signal, small-signal and noise behaviour
of the circuit. After that simulation has finished you can view
the simulation results on a presentation page or window.

Qucs, briefly for Quite Universal Circuit Simulator, is a
circuit simulator with graphical user interface (GUI). The
GUI is based on Qt® by Digia®. The software aims to
support all kinds of circuit simulation types, e.g. DC, AC,
S-parameter, Harmonic Balance analysis, noise analysis,
etc.

Qucsator, the simulation backend, is a command line
circuit simulator. It takes a network list in a certain
format as input and outputs a Qucs dataset. It has been
programmed for usage in the Qucs project but may also be used
by other applications.

The Qucs GUI is well advanced and allows setting up
schematics and presenting simulation results in various types
of diagrams. DC, AC, S-parameter, noise and transient analysis
is possible, mathematical equations and use of a subcircuit
hierarchy (with parameterised subcircuits) are available. Qucs
can also import existing SPICE models for use in your
simulations.

While Qucs is well developed, we still strive to improve the
project, and will always welcome offers of help. Qucs doesn't
just need help with programming, it also needs graphics, high
quality example schematics, tutorials for the website and lots
more.

Qucs comes with an array of components and models. Third party
models including HICUM, BSIM2, BSIM3 and BSIM6 can be compiled
and loaded into the simulator. It also provides many
semiconductor based components and models such as OpAmps,
Diodes, MOSFETs, PMOSFETs and many more. Some example
schematics can be found here which demonstrate some of the
abilities of Qucs, and many more examples are provided with the
program.

Operating Systems

Qucs is currently developed under the
GNU/Linux OS using the standard autotools with no special
effort to support other operating systems. However Qucs is said
to be successfully compiled and run on Windows, Solaris,
NetBSD, FreeBSD, macOS, Cygwin... help is needed!

License

Qucs is released under the GPL license and so
it is free for free programmers and users!